Implement one click login.

chrome/browser/signin/one_click_signin.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SIGNIN_ONE_CLICK_SIGNIN_H_
+#define CHROME_BROWSER_SIGNIN_ONE_CLICK_SIGNIN_H_
+#pragma once
+
+#include <vector>
+
+#include "content/public/browser/web_contents_observer.h"
+#include "webkit/forms/password_form.h"
+#include "webkit/forms/password_form_dom_manager.h"
+
+class PrefService;
+
+namespace content {
+class WebContents;
+}
+
+namespace net {
+class URLRequest;
+}
+
+// Per-tab one-click signin manager.  When a user signs in to a Google service
+// and the profile is not yet connected to a Google account, will start the
+// process of helping the user connect his profile with one click.  The process
+// begins with an infobar and is followed with a confirmation dialog explaining
+// more about what this means.
+class OneClickSigninManager : public content::WebContentsObserver {
+ public:
+  // Returns true if the one-click signin fearture can be offered at this time.

[Andrew T Wilson (Slow), 2012/02/24 22:51:35]

nit: fearture->feature

[Roger Tawa OOO till Jul 10th, 2012/03/01 04:55:17]

Done.

+  // It can be offered if the contents is not in an incognito window.
+  static bool OneClickSigninManager::CanOffer(
+      content::WebContents* web_contents);
+
+  // Looks for the X-Google-Accounts-SignIn response header, and if found,
+  // tries to display an infobar in the tab contents identified by the
+  // child/route id.
+  static void ShowInfoBarIfPossible(net::URLRequest* request,
+                                    int child_id,
+                                    int route_id);
+
+  explicit OneClickSigninManager(content::WebContents* web_contents);
+  ~OneClickSigninManager();
+
+ private:
+  // The portion of ShowInfoBarIfPossible() that needs to run on the UI thread.
+  static void ShowInfoBarUIThread(const std::string& account,
+                                  int child_id,
+                                  int route_id);
+
+  // content::WebContentsObserver overrides.
+  virtual void DidNavigateAnyFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+  virtual void DidStopLoading() OVERRIDE;
+
+  // Save the email address that we can display the info bar correctly.
+  void SaveEmail(const std::string& email);
+
+  // Remember the user's password for later use.
+  void SavePassword(const webkit::forms::PasswordForm& form);
+
+  // Email address and password of the account that has just logged in.
+  std::string email_;
+  std::string password_;
+
+  DISALLOW_COPY_AND_ASSIGN(OneClickSigninManager);
+};
+
+#endif  // CHROME_BROWSER_SIGNIN_ONE_CLICK_SIGNIN_H_